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to 13.4% at 150 ℃ for 3 h under oxygen pressure of 0.85 MPa, with the higher total selectivity to cyclohexanol, cyclohexanone, cyclohexyl hydroperoxide (CHHP) and acid (79.2%) than the neat complex (55.5... and cyclohexanone were carried out by GC, which was equipped with AC-10 capillaries of 30 m in length, 0.25 mm in interior diameter and 0.3 μm in film thickness, and the internal standard was chlorobenzene......
结果说明,乙二醇含量较低时,更有利于得到高纯度的VO2(B)相. 图1 以不同含量的乙二醇作为溶剂所合成产物的XRD谱 Fig. 1 XRD patterns of synthesized products with different contents of ethylene glycol as solvent 图2所示为以不同含量的乙二醇作为溶剂,在 180 ℃反应...同含量的乙二醇作为溶剂所合成产物的SEM像 Fig. 2 SEM images of synthesized products with different contents of ethylene glycol as solvent 图3 不同反应时间所合成产物的XRD谱 Fig. 3 XRD patterns of synthesized products......
microscopy(TEM),BET surface area analysis,H 2 temperature-programmed reduction(H 2-TPR),and O 2 temperature-programmed desorption(O 2-TPD).The oxidative dehydrogenation of ethane(ODHE) to ethylene... played an important role in the lessened reducibility and the distribution of adsorbed oxygen species,consequently influenced the catalytic performance.The best yield to ethylene of 29% was obtained......
powders with homogeneous composition were synthesized by the low temperature combustion process based on the Pechini method. A polymeric precursor sol was formed by using citric acid and ethylene... of residue carbonate ions were also affected by the quantities of citric acid and ethylene glycol.关键词:......
, which were self-assembled by the selective inclusion of b-cyclodextrin (b-CD) onto poly(propylene oxide) (PPO) segment in the poly(ethylene oxide)-block-PPO-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO......
of ethylene carbonate(EC) to methanol and ethylene glycol(EG) as alternative route for the indirect utilization of CO2.The CuPs Ag-copre catalyst synthesized by the co-ammonia evaporation hydrothermal......
microscopy(TEM),BET surface area analysis,H 2 temperature-programmed reduction(H 2-TPR),and O 2 temperature-programmed desorption(O 2-TPD).The oxidative dehydrogenation of ethane(ODHE) to ethylene... played an important role in the lessened reducibility and the distribution of adsorbed oxygen species,consequently influenced the catalytic performance.The best yield to ethylene of 29% was obtained......
the chelating agent was citric acid and the dispersant agent was ethylene glycol. The phase of fine particles was analyzed by XRD and the size and shape of the particles were investigated by TEM......
410082, China) Abstract: The adsorption behaviors of diesel cold starting emissions in LTA zeolite was studied by grand canonical Monte Carlo (GCMC) simulation. Ethylene and propylene were used as probe... of ethylene and propylene has the similar trend, and both of them increase with the increase of pressure and decrease significantly with the increase of temperature. The binary mixtures show competitive......
anodized at different voltages for 4 h in electrolyte of NH4F+ethylene glycol 图2 电解液为NH4F+乙二醇时外加电压对TiO2纳米管阵列生长特性的影响 Fig. 2 Influence of voltage on growing characteristics of TiO2 nanotube array in electrolyte of NH4F+ethylene glycol 电解液为NH4F+乙二醇时阳极氧化不同时间所得TiO2纳米管长度如图4所示,阳极氧化时间5 s,30 s,5 min,10 min,30 min,1 h,2 h,4 h相应的纳米管长度分别为84 nm,105 nm,300 nm,500 nm,1.5 μm,2.5 μm,4 μm,4 μm.随着氧化时间的延......
